Vario Sun is a thermochromic glass that automatically tints in the presence of heat. Due to its intuituve interlayer, Vario Sun reduces the amount of solar energy being transmitted through the glass. 

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This self tinting glass doesn't require any electrical connections, the technology is activated by the heat coming from the sun. Unlike conventional blinds, Vario Sun optimizes natural light in the room, without sacrificing the outside view. And unlike traditional tinted glass, Vario Sun lets in the sun’s warming ray, when the temperatures plummet.